Highly-doped broad-spectrum erbium-ytterbium co-doped superfluorescent fiber source integrated device

Abstract

A highly-doped broad-spectrum erbium-ytterbium co-doped superfluorescent fiber source integrated device comprises a tube shell, a refrigerator, a heat sink, a 980nm laser tube core, a self-focusing lens, a highly-doped erbium-ytterbium co-doped phosphate glass fiber and a tapered lens fiber.The tube shell is in a square structure; the refrigerator is made on the inner bottom surface of the tube shell; the heat sink is made on the upper surface of the refrigerator; the 980nm laser tube core, the self-focusing lens, the highly-doped erbium-ytterbium co-doped phosphate glass fiber and the tapered lens fiber are sequentially arranged on the heat sink and positioned on a same optical path, and the 980nm laser tube core is used for providing pump light.Collimation and focusing of divergent beams are realized by the aid of the self-focusing lens, and efficiency in coupling of a pump laser and highly-doped fibers is improved.

Description

technical field [0001] The invention belongs to the field of semiconductors, and is a highly doped and wide-spectrum Erbium-ytterbium co-doped superfluorescent fiber light source (abbreviated as EYD-SFS) integrated device that plays an important role in the fields of optical fiber communication and optical fiber sensing. Background technique [0002] ErDoped Superfluorescent Fiber Source (ErDoped Superfluorescent Fiber Source, EDF-SFS) is a new type of broadband light source developed in recent years. Spectral line, low polarization superfluorescence output. It has a wide spectral width, up to tens of nanometers, good temperature stability, and low coherence. It is widely used in many fields such as fiber optic gyroscope, EDFA, fiber optic sensing, spectrum testing, and low-cost access network. Especially as a light source for high-precision fiber optic gyroscopes, it has very important strategic significance in the fields of aerospace, aviation and ship guidance. [0003]...

AI Technical Summary

Problems solved by technology

At the same time, one of the biggest problems with broadband light sources of this structure is that the erbium fiber is too long to achieve miniaturization and integration.

Due to the low doping concentration of the fiber, the fiber gain per unit length is low. In order to ensure the output power, a long erbium fiber (about tens of meters) must be used, which cannot integrate the entire system, resulting in the stability of the device. and less reliable

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